【摘 要】
：
Bridge structure in life span,in addition to the need to withstand permanent and variable action,there may be large or small under dynamic loading,such as i
【机 构】
：
Chang'anUniversity,710064,China
【出 处】
：
2016年交通基础设施和材料国际会议
论文部分内容阅读
Bridge structure in life span,in addition to the need to withstand permanent and variable action,there may be large or small under dynamic loading,such as impact,explosion,earthquake etc.In order to get the real response of the structure under dynamic load,based on reasonable dynamic constitutive model,a nonlinear finite element analysis is needed.In this paper,several commonly used models of concrete dynamic constitutive model for ship collision with bridges are introduced: Reinforced concrete damage model(RC damage model),Elastic-Plastic Cap model,HJC model and Elastic model.Then the simulation analysis of two impact tests of rigid beads strike the target concrete walls and hammer strike the RC beams are carried out by using the analysis software LS-DYNA for nonlinear dynamic analysis.In the analysis,the influence of the various dynamic constitutive models on the impact structure is compared,and the calculated dynamic impact force-time curve and displacement-time curve are compared with the experimental data.It is found that the RC damage model can better simulate the change of concrete damage,and can simulate the development of structural cracks more realistic,and can consider the influence of reinforcement ratio on the impact force.Based on this,a multi parameter sensitivity analysis is made on the RC damage constitutive relationship,and the practical formula of the impact force is put forward.Research shows that the maximum impact force increases with the increase of the ratio of reinforcement,and the impact of the ship bridge collision analysis should be considered.
其他文献
With the rapid development of information technology,there is an increasing interest in connected vehicle and related technology.Compared to the large numbe
Current design methods propose that reinforcement loads distribution within reinforced soil slope is affected by slope height instead of slope inclination,w
Highways,railways,airport runways and levees(dikes)consist of multiple structural layers which ultimately rest on an earthen subgrade.Over time,erosion,near
The important effect of cave span,roof thickness and strength on the stability of cavern has been widely recognized,while the influence of geostress on the
In order to cure asphalt pavement distresses caused by expansive soil subgrade,a new maintenance technology based on trenchless technology with the macromol
Five scaled model tests of reinforced foundation with different reinforcement length and depth(layer numbers)as well as one contrast test of unreinforced fo
The need of cement stabilized crushed rock was introduced in the situation that the road roller cant vibrate in the rural areas through the construction of
Ultra high performance concrete(UHPC)is a new type of cement based composites with high strength and excellent durability.Firstly,this paper introduces the
Diamond grinding/grooving(DGAG)of concrete pavement is undertaken for a number of different purposes include improve ride(smoothness),increase skid resistan
Pervious concrete have been widely used in the fields of roads,buildings,water facilities as the material of drainage structure due to the excellent permeab